Austro Hungarian river monitor SMS Koros, she survived the war patrolling the Danube river from Belgrade to the mouth of the Black Sea. Top speed 10 knots - 12 mph. Displacement 448 tons. Armor belt 2 inchs. Main armament two 4.7 inch - 120 mm naval guns mounted in two single turrets fore and aft.

[u/GreatMilitaryBattles]